How to Find Electromagnetic Interference on Car Engine

Introduction

Electromagnetic interference (EMI) is a major problem for car engines. It can cause a variety of problems, including engine misfires, stalling, and even damage to the engine’s electronic components.

EMI is caused by the presence of electrical fields and magnetic fields around the engine. These fields can be generated by a variety of sources, including the spark plugs, the ignition coil, and the alternator.

EMI can be a difficult problem to diagnose, but there are a few things you can do to find and fix it.

Troubleshooting EMI

The first step in troubleshooting EMI is to identify the source of the interference. This can be done by using a spectrum analyzer to measure the electrical and magnetic fields around the engine.

Once you have identified the source of the EMI, you can take steps to reduce or eliminate it. Some common methods for reducing EMI include:

* Shielding the source of the EMI with a metal enclosure.
* Using ferrite beads to filter out EMI on wires.
* Grounding the engine properly.

Testing for EMI

Once you have made changes to reduce or eliminate EMI, it is important to test the engine to make sure that the problem has been resolved. This can be done by using a spectrum analyzer to measure the electrical and magnetic fields around the engine.

If the EMI has been resolved, the spectrum analyzer will show a significant reduction in the levels of electrical and magnetic fields.

Conclusion

EMI is a major problem for car engines, but it can be diagnosed and fixed. By following the steps outlined in this article, you can find and eliminate EMI from your car engine and improve its performance.